linux-kernel - [PATCH] x86/MCE/AMD, EDAC/mce

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Message-Id: <20200809043559.9740-1-zhoufeng.zf@bytedance.com>
Date:   Sun,  9 Aug 2020 12:35:59 +0800
From:   Feng zhou <zhoufeng.zf@...edance.com>
To:     bp@...en8.de, mchehab@...nel.org, tony.luck@...el.com,
        james.morse@....com, rrichter@...vell.com
Cc:     linux-edac@...r.kernel.org, linux-kernel@...r.kernel.org,
        liuxian.1@...edance.com, zhoufeng.zf@...edance.com
Subject: [PATCH] x86/MCE/AMD, EDAC/mce_amd

From: zhoufeng <zhoufeng.zf@...edance.com>

The edac_mce_amd module calls decode_dram_ecc() on AMD Family17h and
later systems. This function is used in amd64_edac_mod to do
system-specific decoding for DRAM ECC errors. The function takes a
"NodeId" as a parameter.

In AMD documentation, NodeId is used to identify a physical die in a
system. This can be used to identify a node in the AMD_NB code and also
it is used with umc_normaddr_to_sysaddr().

However, the input used for decode_dram_ecc() is currently the NUMA node
of a logical CPU. so this will cause the address translation function to
fail or report incorrect results.

Signed-off-by: zhoufeng <zhoufeng.zf@...edance.com>
---
 drivers/edac/mce_amd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/edac/mce_amd.c b/drivers/edac/mce_amd.c
index 325aedf46ff2..73c805113322 100644
--- a/drivers/edac/mce_amd.c
+++ b/drivers/edac/mce_amd.c
@@ -996,7 +996,7 @@ static void decode_smca_error(struct mce *m)
 	}

 	if (bank_type == SMCA_UMC && xec == 0 && decode_dram_ecc)
-		decode_dram_ecc(cpu_to_node(m->extcpu), m);
+		decode_dram_ecc(topology_physical_package_id(m->extcpu), m);
 }

 static inline void amd_decode_err_code(u16 ec)
-- 
2.20.1